Comparison of bone mineral density and body composition measurements in women obtained from two DXA instruments
Abstract
Information is lacking regarding the comparison of bone mineral and body composition measurements obtained from the different dual energy X-ray absorptiometry (DXA) systems. The purpose of this study is to compare body composition and whole body bone mineral density (BMD) measurements from the hologic QDR-4500 W (DXA H) and the lunar (DXA L) systems. Seven women older than 40 years of age, were scanned on the same day by using DXA H and DXA L by the same observer. Measured total fat mass, percentage fat, whole body fat free soft tissue mass and BMD were similar between machines, but body mass was significantly higher with DXA L than with DXA H (P=0.0156). This was due to a higher bone mineral content obtained with DXA L. Agreement between the two DXA systems was quantified by using the Bland and Altman method. For each variable, all pairs of measurements were within the 95% confidence limits. These results suggested that we could use the two measurement methods interchangeably. However, due to the bone mineral inter-machine differences, comparisons of DXA measurements from different machines should be interpreted with caution.
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Some studies have shown DXA measurement differences are less than 2%.
“Some have shown that the measurement differences are Ͻ2% (36 -38).”
From Comparison of Body Composition Methods in Obese African‐American Women (2006) · cites this paper as [36]
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Imboden, M. T., Swartz, A. M., Finch, H. W., Harber, M. P., & Kaminsky, L. A. (2017) · PLOS ONE · doi:10.1371/journal.pone.0176161 · Cited by 75 · see citing works
Comparison of Body Composition Methods in Obese African‐American Women
Newton, R. L., Alfonso, A., York‐Crowe, E., Walden, H., White, M. A., Ryan, D., & Williamson, D. A. (2006) · Obesity · doi:10.1038/oby.2006.55 · Cited by 27 · see citing works
- Authors
- Gillette-Guyonnet, S.
- Venue
- Mechanisms of Ageing and Development
- Publisher
- Elsevier BV
- Published
- 2003-03
- Volume
- 124
- Issue
- 3
- Pages
- 317-321
- ISSN
- 0047-6374 (ISSN-L)
- OpenAlex
- W2024666138
- Cited by
- 32
- References
- 16
- Citations by year
- 2023: 1 · 2022: 1 · 2021: 3 · 2019: 1 · 2018: 1 · 2017: 7 · 2015: 2 · 2013: 3 · 2012: 1
- FWCI
- 2.99
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Mechanisms of Ageing and Development (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Health Sciences › Medicine › Orthopedics and Sports Medicine › Bone health and osteoporosis research
- Health Sciences › Medicine › Physiology › Body Composition Measurement Techniques
- Health Sciences › Medicine › Emergency Medicine › HIV-related health complications and treatments
- Keywords
- bone mineral density, body composition, dual-energy X-ray absorptiometry, inter-instrument agreement, fat mass, older women, measurement reproducibility
- MeSH terms
- Adipose Tissue, Adult, Body Composition, Body Weight, Female, Humans, Middle Aged, Absorptiometry, Photon, Bone Density
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